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The fans within the case probably have a nice layer of dust on them as well. Just take a damp cloth and wipe them down.

If you want, you can even add a drop of oil to the bearings in the middle of the springs while you're in there. Just make sure to pull the fan out of the case so you don't dribble lubricant on anything important.

Don't worry about the fan in your power supplyif you don't know what you're doing, taking a power supply apart can be bad news. Depending on the way your computer's case is set up, you might be able to use the air to blow some of the dust out, but don't aim directly at the fan blades. They may not be designed to move that fast and could break.

Dan Evans is the DIY Analyst for PCMag.com. He has been at the magazine/website for over 10 years and during that tenure has worked on every product team here. When he is not building a PC from scratch he is reviewing laptops, desktops, and videogames. Before coming to PCMag.com he earned a BA in US History at Columbia University and was a member of the oldest collegiate wrestling program in the country. In his spare time he is the co-host of a sports/tech podcast www.thesportscircuit.com....
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